Assessment Reports October 31, 2009

Filed under: UN — swapsushias @ 2:52 am

IPCC Fourth Assessment Report

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IPCC

Assessment reports:

First (1990)

1992 sup.

Second (1995)

Third (2001)

Fourth (2007)

Fifth (2014)

UNFCCC | WMO | UNEP

Climate Change 2007, the Fourth Assessment Report (AR4) of the United Nations Intergovernmental Panel on Climate Change (IPCC), is the fourth in a series of reports intended to assess scientific, technical and socio-economic information concerning climate change, its potential effects, and options for adaptation and mitigation. The report is the largest and most detailed summary of the climate change situation ever undertaken, involving thousands of authors from dozens of countries, and states in its summary,

“Warming of the climate system is unequivocal.”

“Most of the observed increase in global average temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations.”

Some criticisms of the Report have been made.

Climate Change 2007: Report Overview

The Fourth Assessment Report (Climate Change 2007)^[1] is released in four distinct sections:

Working Group I Report (WGI): Climate Change 2007: The Physical Science Basis.
Working Group II Report (WGII): Climate Change 2007: Impacts, Adaptation and Vulnerability.
Working Group III Report (WGIII): Climate Change 2007: Mitigation of Climate Change (final version).
The Synthesis Report (SYR): Summary for Policymakers (SPM)PDF (1.92 MB) (pre-copy edit version).

For each section, the IPCC will release the main report and a summary version, known as the Summary for Policymakers. Full reports and summaries of Working Groups I-III have been released, plus a summary of the Synthesis Report.

The Fifth Assessment Report (AR5) of the United Nations Intergovernmental Panel on Climate Change (IPCC), will be the fifth in a series of such reports. The IPCC was established by the World Meteorological Organization (WMO) and the United Nations Environment Programme (UNEP) to assess scientific, technical and socio-economic information concerning climate change, its potential effects and options for adaptation and mitigation.

The IPCC is currently starting to outline its Fifth Assessment Report (AR5) which will be finalized in 2014.